1659673 has 2 divisors, whose sum is σ = 1659674. Its totient is φ = 1659672.

The previous prime is 1659667. The next prime is 1659683. The reversal of 1659673 is 3769561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1658944 + 729 = 1288^2 + 27^2 .

It is a cyclic number.

It is not a de Polignac number, because 1659673 - 2¹⁷ = 1528601 is a prime.

It is not a weakly prime, because it can be changed into another prime (1659613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 829836 + 829837.

It is an arithmetic number, because the mean of its divisors is an integer number (829837).

2^1659673 is an apocalyptic number.

It is an amenable number.

1659673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1659673 is an equidigital number, since it uses as much as digits as its factorization.

1659673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 37.

The square root of 1659673 is about 1288.2829658115. The cubic root of 1659673 is about 118.3970394697.

It can be divided in two parts, 1659 and 673, that added together give a palindrome (2332).

The spelling of 1659673 in words is "one million, six hundred fifty-nine thousand, six hundred seventy-three".